Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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All episodes available on BBC iPlayer (19 total)
All upcoming (0 new and 6 repeats)
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BBC Horizon's intimate portrait of ESA's first British astronaut
Have a go in this brand new interactive documentary.
See all clips from Horizon
There is a growing body of evidence showing that playing video games could be good for us
Discover the truth about the frequently misunderstood condition
Find out what your risk of heart attack is using this online calculator.